<!DOCTYPE html>
<html lang='en'>

<head>
    <meta charset='UTF-8'>
    <meta http-equiv='X-UA-Compatible' content='IE=edge'>
    <meta name='viewport' content='width=device-width, initial-scale=1.0'>
    <title>Document</title>
    <script src='../vue.js'></script>
</head>

<body>
    <div id='app'>
        <h1>计数器{{count}}</h1>
        <button @click="count++">累加</button>
        <button @click="add">累减</button>
    </div>
    <script>
        Vue.config.productionTip = false;
        const vm = new Vue({
            el: '#app',
            data() {
                return {
                    count:0,
                }
            },
            methods:{
                add(){
                    this.count--
                }
            }
        })
    </script>
</body>

</html>